<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>原生ajax</title>
</head>
<body>
    <!-- 原生ajax -->
    <!--  -->
 <script>
    var xhr=new XMLHttpRequest()
    xhr.open('get','geyao.html',true);
    xhr.send(null)
    xhr.onreadystatechange=function(){
        if(xhr.readyState==4){
            if(xhr.status==200){
                console.log(xhr.responseText)
            }
        }
    }
 </script>
</body>
</html>